18 or 20" 7.62x39 AR-15 Barrel Options?

asdaven · Mar 13, 2015

Does anybody sell 7.62x39 AR-15 Barrels or complete uppers in 18" or 20" lengths? I see Model 1 Sales sells an Upper, but people say they are horrible. I'm looking for a quality barrel for maximum accuracy and might just have to build an upper if no-one sells an decent complete upper in those barrel lengths. Ive only built lowers, what tools do you need to build an upper besides a barrel wrench and punches? Do I need headspace gauges or feeler gauges? What brand would you reccomend for a bolt/bolt carrier group for 7.62x39? Also, do I need to change buffers or springs? I currently have a 5.56 AR I built with the Standard A2 Rifle Buttstock and Buffer Tube.

Thanks-

chevellenut71 · Mar 13, 2015

If you haven't, read over this. good info. I also did a quick search and found a lot of uppers for sale.

http://www.majorpandemic.com/2014/11/making-762-39-Work-Reliably-on-AR15.html

Brad · Mar 13, 2015

If you cant find one you could try "Ordnance Direct Company". The website is terrible but dont let that deter you. I could not find a 9mm barrel that I wanted so I had them custom make one for me and the price was great as well. Had a great experience with them and barrel is great. Worth a shot if you cant find what you want.

http://www.ordnancedirect.com/

ericoak · Mar 13, 2015

Hasn't the 7.62x39 already peaked at 16"?

asdaven · Mar 13, 2015

Not quite, but I don't think it gains much past 16". Maybe 200-300fps. But, the SKS, the original rifle the 7.62x39 was designed for had/has a 20" barrel. You get longer sight radius too.

Ill check into those other options.

Thanks-

ericoak · Mar 13, 2015

asdaven said:
Not quite, but I don't think it gains much past 16". Maybe 200-300fps. But, the SKS, the original rifle the 7.62x39 was designed for had/has a 20" barrel. You get longer sight radius too.

Ill check into those other options.

Thanks-

Nope its less than a 100 fps difference between a 16 and a 20, so about 25fps per inch. Which is basically nothing. Sight radius is another story, but ballistically they are basically the same.

asdaven · Mar 13, 2015

With the AR, there is also the issue of the short gas systems vs the longer ones. Mid Length and Rifle length gas systems are better for reliability and longevity. Carbine gas systems get hot.

sailskidrive · Mar 15, 2015

I never understood this option in an AR.

Why not just build a 300BLK instead? Much great parts availability and you don't have to deal with the silly mag issue.

smdub · Mar 15, 2015

sailskidrive said:
I never understood this option in an AR.

Why not just build a 300BLK instead?

There's that silly issue of cost. 300blk is 4x+ more expensive. During the panic x39 was a ton cheaper than 5.56 too.

Boss94 · Mar 15, 2015

Mark at Precision Firearms has some nice 7.62x39 uppers and he is a IP. I bought 1 from him about 4 years ago and love it !!

asdaven · Mar 15, 2015

smdub said:
There's that silly issue of cost. 300blk is 4x+ more expensive. During the panic x39 was a ton cheaper than 5.56 too.

Yepp. I've thought about .300 Blackout. But, its almost as much as 6.8 SPC. But, for those who reload, it can be created from .223 brass. I think its cheap to reload for. I don't like the fact though that it will chamber in a .223 chambering. Have to be careful.

18 or 20" 7.62x39 AR-15 Barrel Options?

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